Description

Yeastar TG400L (LTE/4G) Gateway

Yeastar TG400L (LTE/4G) Gateway connects four LTE/4G mobile networks to VoIP systems with high-speed, reliable performance. This quad-channel LTE gateway converts four LTE SIM cards into SIP trunks, enabling fast mobile-to-VoIP integration with superior data rates and voice quality. Medium to large businesses, call centers, multi-site operations, rural deployments, transportation companies and organizations requiring high-bandwidth mobile connectivity choose the TG400L for its advanced LTE support, robust call handling, intelligent routing and dependable cellular-to-IP conversion.

Leverage 4G/LTE networks for primary or backup trunks. Register four LTE SIMs as SIP trunks. Achieve crystal-clear HD voice calls. Implement least cost routing, load balancing and automatic failover. Support high-speed data alongside voice in remote locations. The TG400L delivers scalable, future-ready LTE connectivity in a compact, rack-mountable unit, ideal for businesses transitioning to or augmenting with modern cellular networks.

Detailed Use Cases and Compatibility

High-Speed Mobile Trunking

Businesses route outbound calls through cost-effective LTE SIMs with higher data allowances. The TG400L supports least cost routing by prefix or carrier, optimizing expenses for high-volume calling. Inbound LTE calls route to IP extensions, queues or IVR. Perfect for call centers or sales teams needing reliable mobile connectivity.

Primary Connectivity in Remote or Underserved Areas

Locations without fixed broadband use the TG400L to provide full VoIP service over LTE. Each SIM supports voice and data, enabling remote PBX registration, extension mobility and cloud integration. The gateway handles high concurrent calls with low latency thanks to LTE speeds.

Failover and Hybrid Redundancy

Enterprises deploy the TG400L as a high-speed backup trunk group. During wired internet outages, calls failover automatically to LTE lines with minimal disruption. Inbound failover routes mobile calls to IP destinations. This setup ensures continuity for critical operations in retail chains, field services or emergency response.

Mobile Hotspot and Data + Voice Applications

Organizations use the TG400L to provide both VoIP trunks and internet access via LTE. Connect IP phones, softphones and devices through the gateway’s LAN port. Load balancing across four SIMs maximizes bandwidth for voice and data simultaneously.

Compatibility and Integration

The Yeastar TG400L integrates with major IP PBX platforms including Yeastar S-Series, P-Series, Asterisk, FreePBX, 3CX, Issabel, FusionPBX and most SIP-compliant systems. It supports global LTE/4G bands and SIM cards from major carriers. Compatible with SIP trunks from cloud providers and hybrid setups. Provisioning occurs via web GUI, auto-provisioning or Yeastar Device Management System.

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Technical Specifications

Port Configuration

• 4 × LTE/4G channels (global bands support)
• 1 × 10/100/1000 Mbps Ethernet port
• Nano SIM card slots (4)

Voice Processing

• HD voice support (G.722, Opus wideband)
• Echo cancellation (G.168)
• Comfort noise generation
• Voice activity detection
• Adaptive jitter buffer

Telephony Features

• SIP RFC3261 compliant
• Caller ID presentation/restriction
• Call progress tone detection
• DTMF relay (RFC2833, Inband, SIP INFO)
• Call duration/SIM balance limitation
• Flexible dial plans and number manipulation
• Least cost routing, failover routing, SIM grouping
• USSD for SIM balance and signal query

Network and Security

• NAT traversal (STUN, ICE)
• VLAN tagging (802.1Q)
• QoS support (DiffServ, ToS)
• TLS/SRTP encryption
• Web-based management GUI
• Auto provisioning via HTTP/HTTPS/TFTP
• SIM lock, blacklist/whitelist, signal strength monitoring, APN configuration

Physical Design

• Compact 1U rack-mountable chassis
• Dimensions: 213 mm × 160 mm × 44 mm
• Weight: approximately 1.0 kg
• Power: 12V/5A adapter (included)
• Operating temperature: 0°C to 40°C
• Humidity: 10% to 90% non-condensing

System Requirements

Active LTE/4G SIM cards with voice and data service. Broadband internet or LAN connection for SIP registration. SIP server/PBX or cloud VoIP provider.

SIP protocol standards maintained by IETF. HD voice codec specifications detailed by ITU-T. Ethernet standards defined by IEEE 802.3.

Warranty, Support and Product Reliability

TopGadgets guarantees the Yeastar TG400L (LTE/4G) Gateway with a full 12-month manufacturer warranty covering defects in materials and workmanship. Our support team provides prompt assistance for SIM activation, LTE band configuration, channel setup, routing optimization, signal troubleshooting and firmware updates. We stock only genuine Yeastar products from authorized distributors. Enjoy secure purchasing, fast delivery and dedicated customer service focused on your complete satisfaction.

This advanced quad-channel LTE gateway offers high-speed mobile connectivity and cost optimization for modern VoIP environments. Embrace reliable 4G/LTE integration with the Yeastar TG400L today.